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Welcome to ZEV Help! Your Guide to Zero-Emission Commercial Vehicles

Fleet Charging Guide for Electric Trucks

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For most fleets, charging, not the truck, is the hardest part of going electric. This guide walks through the decisions that determine whether a battery-electric truck program succeeds: where to charge, how much power you need, how long it takes, and what it costs.

Planning tip: Call your electric utility before you order trucks. Bringing new power to a depot routinely takes one to three years.

Depot, public, or charging-as-a-service?

OptionBest forTrade-offs
Depot charging (your own site)Return-to-base routes: drayage, regional delivery, refuse, and local pickup and delivery.Lowest cost per mile and full control, but needs capital, utility upgrades, and land.
Public or shared truck stopsTrucks that cannot return to base each night, and top-up charging.No construction, but heavy-duty sites are still scarce and pricing is higher.
Charging-as-a-serviceFleets that want to avoid upfront capital or lack suitable property.A provider builds and runs the chargers for a per-kWh or monthly fee. Contract terms matter.

How much power do you need?

Start from your duty cycle, not the charger catalog. For each truck, estimate daily miles, the energy use per mile from the manufacturer, and how many hours it sits at the depot. Overnight dwell of eight hours or more usually means lower-power chargers are enough. Short dwell times call for faster, more expensive charging.

Charging levels for trucks

  • AC Level 2 (up to about 19 kW): mainly for light- and medium-duty vehicles with long overnight dwell.
  • DC fast charging (roughly 50–400 kW): the workhorse for heavy-duty depots today, using CCS1 connectors.
  • Megawatt Charging System (MCS): the new heavy-duty standard (SAE J3271) designed for 1 MW and above, aimed at long-haul trucks charging during a mandated rest break. Expect MCS-capable trucks and chargers to roll out gradually.

The utility timeline

  • Load request and site assessment: the utility checks whether nearby circuits and substations can serve your load.
  • Design and make-ready construction: transformers, switchgear, and conduit. Many utilities have make-ready programs that pay for part of this.
  • Charger installation and commissioning: the fastest step once power is available.

Large depots may require substation upgrades, which can stretch timelines further. Phase your fleet rollout to match the power you can actually get.

What charging costs

Your electricity bill has two parts that matter: the energy charge (per kWh) and the demand charge (based on your highest power draw in a billing period). Demand charges can make fast, simultaneous charging very expensive. Ways to manage them include:

  • Managed or “smart” charging software that spreads charging across the night.
  • Time-of-use or EV fleet rates offered by many utilities.
  • On-site batteries or solar to shave peaks, where the economics work.

Checklist before you buy trucks

  • Map each route’s daily miles, payload, and dwell time.
  • Contact your utility and request a load study.
  • Check for utility make-ready and state incentive programs (see our 2026 incentives guide).
  • Plan for growth: size conduit and switchgear for future chargers.
  • Decide who will maintain chargers, and set uptime targets in contracts.
  • Train drivers and technicians on charging procedures and high-voltage safety.

How much heavy-duty charging exists today?

See our live heavy-duty station data for current counts of truck-capable charging, Megawatt Charging System sites, and hydrogen stations by state, updated automatically from the U.S. Department of Energy.

Find public charging and planned heavy-duty sites with the Department of Energy’s Alternative Fuels Station Locator.

See also: Charging Infrastructure · Charging Basics · Operating Zero-Emission Trucks

Related reading
Sources

Last reviewed: October 2026